Looking at the scripture from Matthew 29:19- 20.
God has instructed us to keep spreading the word of God to all nations. And one of the criteria is to be baptized after receiving the word of God.
So, baptism is just as a result of accepting Christ as a new creature. And baptism should be done once. Baptism is not just a necessity, but it is a must so that our soul may be saved.
And to follow that doctrine of God. Those that depend on many doctrines, that serve so many religions, but in all religions, they should be baptized once and for all.
Jesus Christ has given us Christianity, at the head of all, to practice. And we have been encouraged to baptize. And baptism should be done only once. Because carrying out baptism twice is not necessary at all.
As we continue to obey the word of God,
we need to adhere to his principles and do the right thing, so that he blesses us richly.